Question

Displacement current is due to -

• A. the flow of electrons
• B. the varying electric field
• C. the ionization of atmosphere
• D. the flow of protons

Hint:

Displacement current arises only in regions where the electric field changes with time — like between capacitor plates during charging or discharging.

Answer 1

The Correct Option is B

Displacement current was introduced by James Clerk Maxwell to explain the continuity of current in a capacitor circuit where actual charge flow is absent between the plates.
It is produced due to a time-varying electric field between the plates of a capacitor: \[ I_d = \epsilon_0 \frac{d\Phi_E}{dt} \] where \( \frac{d\Phi_E}{dt} \) is the rate of change of electric flux.